What is the ASP.NET Ajax Framework? What versions have been released so far?

ASP.NET AJAX is a free framework to implement Ajax in asp.net web applications, for quickly creating efficient and interactive Web applications that work across all popular browsers.The Ajax Framework is powered with1 - Reusable Ajax Controls2 - Support for all modern browsers3 - Access remote services and data from the browser without tons of complicated script. Versions of Ajax release1 - ASP.NET Ajax Framework 1.0 (earlier release to this was called the Atlas)2 - ASP.NET Ajax Framework 1.0 was available as a separate download for ASP.NET 2.0